Mystery
Matter & Energy
Atomic Structure
Periodic Table & Elements
Chemical Bonding
Moles &
Stoichiometry
Stoichiometry
100
What is the standard temperature and standard pressure?
SP: 101.3 kPa or 1 atm
ST: 273 K or 0°C
100
Name the following phase changes:
solid --> liquid
liquid --> solid
melting
freezing
100
Which subatomic particles are located in the nucleus
of an atom?
protons & neutrons
100
State the following values for the element Magnesium:
Symbol
Atomic Number
Atomic Mass
Electron Configuration
Oxidation State
Magnesium:
Symbol: Mg
Atomic Number: 12
Atomic Mass: 24.305
Electron Configuration: 2-8-2
Oxidation State: +2
100
Which electrons are involved a chemical bond between two elements?
Valence electrons.
100
What are the REACTANTS and PRODUCTS in this chemical equation?
2 HCl + 2 Na --> NaCl + H2
Reactants: HCl + Na
Products: NaCl + H2
200
As the pressure of a gas increases, what happens to the temperature?
increases
200
Name the following phase changes:
liquid --> gas
gas --> liquid
boiling / evaporation / vaporization
condensation
200
State the charge of each subatomic particle: proton, electron, neutron.
proton: +
electron: -
neutron: 0
200
Label the following elements as either Metal, Nonmetal, Metalloid.
Strontium:
Silicon:
Phosphorus:
Strontium: Metal
Silicon: Metalloid
Phosphorus: Nonmetal
200
When a bond is formed, energy is (absorbed/released).
When a bond breaks, energy is (absorbed/released).
When a bond is formed, energy is released.
When a bond breaks, energy is absorbed.
200
What is Avogadro's Number?
6.022 x 1023 particles
300
J. J. Thomson used the Cathode Ray Tube to discover which subatomic particle of the atom?
electron
300
__________ is the average kinetic energy of the particles of matter.
Temperature
300
What is the mass number of an atom that contains 8
protons, 8 electrons, and 7 neutrons?
mass number: 15
300
Name an element that is a good conductor. Explain what "conductor" means and how you know.
Any metal. Conductor means it can pass heat and electricity.
300
Explain the difference in the motion of electrons in ionic bonds and covalent bonds.
Bonus (100): Describe the motion of electrons in metallic bonds.
Ionic: electrons transfer
Covalent: electrons are shared
Metallic: electrons flow freely
300
How many grams are in 1 mole of oxygen?
About 16 grams / 1 mole
400
Calculate the density of a substance with a mass of 12 grams and a volume of 4 cm3, with correct units.
3 g/cm3
400
As a solid melts into a liquid, is energy absorbed or released? Is this process endothermic or exothermic?
absorbed, endothermic
400
What is the total number of neutrons in the nucleus of a neutral atom that has 3 protons and a mass number of 7?
4 neutrons
400
What is the periodic trend for atomic radius and electronegativity in the Periodic Table? (Increases toward _________ and __________.)
Atomic radius: Increases LEFT and DOWN.
Electronegativity: Increases RIGHT and UP.
400
Which of the following compounds is a covalent compound (molecule)? How do you know?
NaCl
CH4
MgO
CaCO3
CH4 (nonmetal-nonmetal)
400
What is the gram formula-mass of Ca(OH)2?
Show your work!
74.1 g/mol
500
Describe two conclusions Rutherford made about the atom after his Gold Foil experiment.
Atom is mostly empty space
Atom has small, dense, positively charged nucleus.
500
Which equation would you use solve the following problem?
"What is the total amount of heat required to completely melt 7 grams of ice at its melting point?"
Bonus 100 pts: Show the correct set up to solve the problem, and calculate the answer.
q = mHf
2338 J
500
Write an example of an electron configuration of Fluorine in the excited state.
NOT 2-7
500
Metals tend to become (positive/negative) ions.
Nonmetals tend to become (positive/negative) ions.
Bonus: Explain why this trend occurs.
Metals tend to become positive ions.
Nonmetals tend to become negative ions.
500
Describe two differences in physical properties between ionic and covalent compounds.
See teacher.
500
Describe how you can identify two of the following types of reactions: (Bonus for more)
- Synthesis
- Decomposition
- Single Replacement
- Double Replacement
- Combustion
See teacher :)
600
What is the total number of Joules lost when 10. grams of water at 80.ºC is cooled to 60.ºC? (Show all work!)
840 Joules
600
Show the correct equation and set up to solve the problem below:
"A gas with a volume of 300.0 mL at STP is changed to a pressure of 1.5 atm at constant temperature. What is the new volume of the gas, in mL?"
Bonus 100 pts: Show the correct set up to solve the problem, and calculate the answer.
200 mL
600
Explain how a bright-line spectrum is produced, in terms of electrons, excited state, energy, and ground state.
—Different colors of light are produced when electrons return from higher energy states to lower energy states.
—Light energy can be emitted when electrons in excited atoms return to lower shells.
600
What is an "allotrope"? Give two examples of allotropes of one element. Then, explain why they are allotropes and how they are different.
Solid carbon can exist as graphite or as diamond. These two forms of carbon have different properties and different crystal structures.
600
Full points, complete the following:
- Draw the lewis dot structure for H2O.
- Determine the bond polarity between H and O. (ionic, polar covalent, nonpolar covalent)
- Is H2O a polar or nonpolar molecule? Explain why.
See teacher.
600
Balance the following chemical equation:
____ S + _____ O2 --> _____ SO3
2 S +3 O2 --> 2 SO3